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' (NoMoael.)

W. W. DAVIS. LOCK.

No.. 529,606. Patented Nov.. v 20, 1894.

l. u-f A/ www ' ATTORNEYS.

UNITED STATES PATENT OFFICE.

WILLIAM W. DAVIS, OFEAST ORANGE, NEW JERSEY.

L O C K lSIEIIIGIFIGA'LION forming part of Letters Patent No. 529,606, dated November 20, 1 894.

Application filed August 15 1894. Serial No. 520.381. (No model.)

To a/ZZ whom; it may concern:

Be it known that I, WILLIAM W. DAVIS, of East Orange, in the county ot Essex and State of New Jersey, have invented a new and Improved Lock, of. which the following is a full, clear, and exact description.

My invention relates to improvements `in that class of door locks shown in Letters Patent of the United States, No, 521,366, dated June 12, 1894,'which shows the mechanism so arranged that when the door is open no parts of the lock will project in such a manner as .to catch the person or clothing of people pass- Ing near. y

The object of my present invention -is to construct a lock'having no protruding parts and also to improve the internal mechanism, to the end that the lock may be extremely positive in operation and little likely to get out of order. i

To these ends my invention consists of certain features of construction and combinations of parts, which will 'be hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forminga part ofthis specification, in which similar figures of reference indicate corresponding parts in all the views.

Figure 1 is a broken sectional elevation of the lock as applied to a door and frame, with the door in closed position. Fig. 2 is a sectional plan of the same. f Fig. 3 is a detail.

sectional plan, showing theposition of the parts as the door is about to close and actu ate the slide which is held in the keeper plate of the door frame, and which throws the latch into the lock case of the door. Fig. 4 is a detail rear elevation of the locking mechanism held in the keeper plate of the door frame;

land Fig. 5 is a detail perspective view ot' the slide and striking plate which are adapted to throw the latch into engagement with the lock case.

The lock is provided with a case of substantially the usual kind, which isadapted to be countersunk in the door 11 in the usual way, and the door is arranged to swing inthe ordinary manner against the stop head or facing strip 12 of the frame 13. The face plate of the case 10 is provided with the usual bolt aperture 14 which, however, instead of containing the ordinary bolt is normally closed by a swinging fly 15 which is pivoted at one edge, as shown at 16, and the free edge of which is adapted to swing in the recess 17 in the lock case and door. rllhe iiy 15l is suitably pivoted between ears 10a on the lock case and such ears are formed at both 'vertical edges of the opening 14-in order to permit of pivoting the ily 15 at either side of said opening to adapt thelock to a door swinging either way. The fly l5 is held closed, so that the lock case will present a perfectly smooth front, by a spiral spring 18 which is arranged to press upon the ily and is held upon a guide rod or plunger 19 which moves between the guides 2O on the lock case, and the guide rod is secured to-a slide plate 21 having a keeper 22 on one edge, which keeper slides on the upper guide 2O and the keeper receives the head 23 of a guide rod 24, which is secured to the front edge ofV the lock and projects through the end of the'keeper 22 which is pressed by a spring 25 encircling the guide rod 24, andthe `tension of the spring holds the slide 21 in close contact with the follower 26 which is of exactly the usual kind and is fastenedto the ordinary lock spindle 27 which is heldin the lock and door in the ordinary way and provided withthe usual knob 28. It will thus be seen that by turning the knob in the ordinary manner the follower will be forced against the slide plate 21 so as to move it andv carry the rod.19 against the tly 15 with sufficient force to close the fly and force out the latch which is held in the fly opening, as will be described below.

The door frame 13 is provided, ata point opposite the lock case, with a keeper plate 29, which has an opening`30 in `it Iopposite the ii-y 15 of` the lock, and in this opening is pivote'd a latch 31 which has anouter flat face adapted to lie flush with the face of the keeper plate 29, the latch being pivoted between lugs 32 on the keeper plate and it has al curved tail 33 adapted t0 tit a corresponding curvedv portion of the keeper. plate, as shown best in Fig. 3,'thus insuring an easy movement and a tight joint.

The/latch 31 has on itsinner or back side, parallel cam wings 34, which are curved on both edges, the free edges being curved, as shown at 35, to t the corresponding curved portion of the lugs which are secured to ICO or formed on the keeper plate 29, and these lugs carry a pin 36 at their inner ends, to which is secured a spring 37 and the spring `is also secured to a pin 38 at the apices of the curved or conoidal Wings 34, and the spring thus serves to hold the latch 3l in either an open or closed position. When the latch is thrown outward, as will be hereinafter described, into the position shown in Fig. 2, so as to enter the opening 14 in the lock case, the pressure of the spring 37 will hold the latch in the said locked position, and when the latch is closed, as shown in Fig. 3, the center of pressure from the spring is changed and the spring serves to hold the latch in closed position.

Between the lugs 35, near the keeper plate 29, is a slideway 39 in which moves a slide block 40 which is secured to a striking block 4l placed at right angles to it, and this striking block has a thickened end 42 which is adapted to project beyond the stop bead or facing strip l2 parallel with the striking plate 29. The slide plate 40 carries a spring tongue 43 which extends between the wings 34 of the latch and terminates in a cross bar 44 adapted to ride on the curved back sides or edges of the wings 34, and consequently when the slide 40 is moved inward it4 pulls the cross bar against the back edges of the Wings 34 and forces the latch 3l outward. A spiral spring 43a serves as an auxiliary to the spring 43, the former being connected to a lug 35a and the striking block 4l; also, the door ll has preferably a wear plate ll adapted for contact with the striking block.

The operation of the lock is as followsz lVhen the door is opened the iy 15 lies flush with the face plate of the lock case l0, and the flat side of the latch 3l is flush with the face of the keeper plate 29. Then the door is closed it strikes the thickened end 42 of the striking block 4l just before it reaches the shoulder l2, and the movement of the striking block and slide plate 40 pulls on the cross bar 44w and forces ont the latch 3l to a point when the spring 37 exerts a pressure against the latch 34 outward toward the ily, which fly is forced inward and, as soon as the latch is fairly started, the change of position of the spring 37 causes the latter to push the latch Well into the opening of the lock case, in which place it is securely held by the spring, so that the door is kept rmly closed until the knob 28 is turned, when the rod 19 :is forced against the fly l5 as above described, closing the fly and pushing in the latch 3l which is held by the spring 37, and then when the door is opened it presents a smooth edge and the keeper plate 29 presents a smooth face.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The combination, with the keeper plate having projections at its inner side, the swinging latch held in an opening of the keeper plate, and the wings on the back of the latch, of the striking block projecting in front of the keeper plate, a spring tongue carried by the striking block and engaging the backs of the said wings t-o force the latch outwardly, and a-spring 43, substantially as described.

2. In a door lock, the combination with the case having an opening and pivot lugs at opposite sides thereof of the reversible fly adapted to be pivoted to either of the lugs, the lock spindle and means for actuating the reversible fly from the spindle, substantially as described.

3. In a door lock, the combination with the lock case having an opening in the face plate, and the Iiy pivoted in the case and adapted to normally close the opening, of the lock spindle, the follower thereon, the springpressed slide plate held against the follower, the guide rod carried by the slide plate and adapted to strike the tly, and a spring on the guide rod to press the fly, substantially as described.

4. A door lock, comprising the usual'case having an opening in the face plate, a fly hinged in the said opening, the usual lock spindle, means for closing the fly by the movement of the spindle, a keeper plate adapted to be secured in the door frame, a swinging latch held in the keeper plate and adapted to swing into the lock case against the fly, and a spring secured to the latch and to an adjacent support and arranged to hold the latch in either an open or closed position, substantially as described.

5. In a lock, the combination with the apertured keeper plate, of the spring-pressed latch hung in the plate and adapted to close the aperture, thelatch having a cam surface on its back, the movable striking block projecting adjacent to the keeper plate, and a cross bar carried by the striking `block and adapted to engage the cam surface on the back of the latch, substantially as described.

6. The combination, with the keeper plate, the swinging latch held in an opening of the IOO IIC

keeper plate and the curved wings on the back of the latch, of the striking block projecting in front of the keeper plate, a tongue carried by the striking block, and a cross bar carried by the tongue and adapted to engage the backs of the wings, substantially as described.

7. In a lock, the combination, with the keeper plate having an opening therein, the latch adapted to close the opening and provided with curved wings on its back, the spring arranged to hold the latch in either an open or closed position, the striking block projecting in front ofthe keeper plate, a guide plate secured to the striking block and held to move in a slideway, a tongue carried by the striking block, and a cross bar carried by the tongue and adapted to engage the wings on the latch back, substantially as described.

S. The combination with the door and frame, the lock case fastened in the door and IZO provided with an aperture and a tly held to means for forcing out the latch by the Inoveclose the aperture, an apertured keeper plate ment of the striking block, substantially as 1o secured in the door frame, a latch adapted to described. close the aperture in the keeper plate and to t swing inward against the tly in the lock case, o WHJLIAM W' DAVIb' a spring arranged to hold the latch in either Witnesses:

an open or closed position, a striking block C. SEDGWIOK,

projecting into the path of the door, and J. L. MCAULIFFE. 

